Classical and quantum correlations under decoherence

Details Classical and quantum correlations under decoherence Classical and quantum correlations under decoherence

2009-05-20

arxiv.org/abs/0905.3396v3

Phys. Rev. A 80, 044102 (2009)

Physics

Quantum Physics

Published version

Scientific paper

10.1103/PhysRevA.80.044102

Recently some authors have pointed out that there exist nonclassical correlations which are more general, and possibly more fundamental, than entanglement. For these general quantum correlations and their classical counterparts, under the action of decoherence, we identify three general types of dynamics that include a peculiar sudden change in their decay rates. We show that, under suitable conditions, the classical correlation is unaffected by decoherence. Such dynamic behavior suggests an operational measure of both classical and quantum correlations that can be computed without any extremization procedure.

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